Replace The Fuel Feed Pump; Replace High-Pressure Fuel Pump - Yanmar BY Series Service Manual

Repair
12/05

Replace the Fuel Feed Pump

1. Disconnect the battery negative (-) cable.
2. Shut off all valves in the fuel supply system.
3. Disconnect electrical connector
(Figure 6-21, (1)).
Figure 6-21
( 1 )
Figure 6-21
4. Remove supply line (Figure 6-21, (2)) and
pressure line (Figure 6-21, (3)) from fuel feed
pump. NOTICE: Install caps or plugs on all
open fittings to prevent contamination of the
fuel system.
5. Remove four bolts and remove pump from
electrical bracket.
6. Transfer fuel pump mounts to new pump.
7. Install fuel feed pump.
8. Connect the supply and pressure lines.
9. Connect the electrical wiring connector.
10. Open all fuel supply valves.
11. Connect the battery negative (-) cable.
12. Bleed fuel system. See Bleed the Fuel System
on page 6-22.
13. Start the engine and check for leaks.
14. Check and delete any trouble codes that are
registered in the ECU after the work has been
completed.
BY Service Manual
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0003686
© 2009 Yanmar Marine International

Replace High-Pressure Fuel Pump

Removal
NOTICE: When working on the oil, coolant or fuel
systems you must protect the alternator from
contamination. Cover alternator with suitable
materials.
1. Disconnect the battery negative (-) cable.
2. Shut off all valves in the fuel supply system.
3. Remove intake manifold. See Intake Manifold
on page 5-66.
4. Remove alternator drive belt. See Remove and
Install Alternator on page 11-5 and Replace
Seawater Pump Belt on page 7-19.
5. Disconnect electrical connector
(Figure 6-22, (1)) from fuel volume regulator.
Figure 6-22
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Figure 6-22
6. Disconnect fuel supply line (Figure 6-22, (2)).
NOTICE: Immediately cap or plug all openings
to prevent contamination of system.
7. Remove banjo bolt (Figure 6-22, (3)) and
disconnect fuel return line.
8. Remove high-pressure line (Figure 6-22, (4))
between pump and fuel rail using special tool
OEM No. 13 5 020.
FUEL SYSTEM
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0003687
6-15